And today the world No.86, who is out of the Australian Open with injury, told Aussie radio station 3AW he had received offers via social media.

"I have, not face-to-face, but on social media," Kokkinakis said. “You read some stuff on your Facebook page, just randoms from nowhere, saying: 'I'll pay you this much money to tank the game', but you try to block it off, get rid of that stuff and focus on what you need to do ahead. You don't really take it seriously, there's all these randoms around the place."

Reveal: Djokovic says he has rejected over £100,000 to throw a match (Image: Getty)

Kokkinakis said he also received heavy online criticism if he lost a match.

"It's interesting,” he said. “If you lose a match that maybe the bettors think you should have won you get abused on social media - it's a very common thing. Anyone who says they don't is probably just trying to keep it in. I would assume in other sports it's a very common thing.”

The Melbourne Age today reported that the Victoria Police questioned local tennis officials last week about the possibility of match-fixing at the Australian Open.